A little boy has a big hole in his life after his brother's death. It's in the bottom bunk where Matty used to sleep, and on Matty's chair at dinner. It follows him everywhere - and he hates it. But with the help of a friend, he manages to climb into the hole and confront his grief - the sadness, the anger, and the simple truth of how much he misses his brother. And when he finally feels ready to share stories about Matty again, he realises he can find some comfort in filling the hole with his favourite memories.